Stock Based Compensation - Summary of option activity (Details) - USD ($)
$ / shares in Units, $ in Thousands |
12 Months Ended |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
| Weighted-average Remaining Contractual Term (in years) |
|
|
|
| Cash received from options exercised |
$ 106
|
$ 23
|
|
| Future compensation costs related to the unvested portion of stock options |
$ 23,307
|
|
|
| 2014 Plan |
|
|
|
| Number of Shares |
|
|
|
| Outstanding at beginning of period |
23,475,984
|
23,020,981
|
|
| Granted |
12,285,359
|
1,719,754
|
|
| Exercised |
(1,160,930)
|
(1,097,370)
|
|
| Forfeited or expired |
(192,464)
|
(167,381)
|
|
| Outstanding at end of period |
34,407,949
|
23,475,984
|
23,020,981
|
| Exercisable |
19,603,474
|
18,023,695
|
|
| Weighted-average Exercise Price |
|
|
|
| Outstanding at beginning of period |
$ 0.06
|
$ 0.06
|
|
| Granted |
5.10
|
0.16
|
|
| Exercised |
0.09
|
0.02
|
|
| Forfeited or expired |
0.84
|
0.15
|
|
| Outstanding at end of period |
1.86
|
0.06
|
$ 0.06
|
| Exercisable |
$ 0.05
|
$ 0.04
|
|
| Weighted-average Remaining Contractual Term (in years) |
|
|
|
| Weighted average remaining contractual term |
6 years 11 months 23 days
|
6 years 6 months 10 days
|
7 years 21 days
|
| Exercisable |
5 years 2 months 15 days
|
5 years 11 months 15 days
|
|
| Cash received from options exercised |
$ 106
|
$ 23
|
|